/**
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

package org.cspoker.common.util.threading;

import java.io.Serializable;
import java.util.Comparator;

public class SocketRunnableComparator implements Comparator<Runnable>,
		Serializable {

	private static final long serialVersionUID = -7519917180114220646L;

	/**
	 * Note: this comparator imposes orderings that are inconsistent with
	 * equals.
	 */
	public int compare(Runnable o1, Runnable o2) {
		int priority1 = getPriority(o1);
		int priority2 = getPriority(o2);
		// negative if 1 is less than 2; if 1 comes before 2; of 1 has a higher
		// priority than 2
		return -priority1 + priority2;
	}

	public int getPriority(Runnable o) {
		if (o instanceof Prioritizable) {
			return ((Prioritizable) o).getPriority();
		}
		return 0;
	}
}
